• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.


Randall008

Member
Joined
Jan 26, 2021
Messages
42
Reaction score
7
Points
8
Location
Maine
Vehicle Year
1988
Make / Model
Ford bronco ii
Transmission
Manual
Hi,
I've got a 1987 Bronco II. It's a 2 wheel drive. It runs and drives well. When I bought the truck. It had a pretty bad grinding noise when I would go from stop at a red light to take off. I figured it was either sticking brakes or the transmission. I checked the brakes, but they looked ok. I had the transmission checked and it was fine. It turned out to be very badly worn cv joints. This took care of most of the issue. However, I still get a similar vibration or shudder if I am stopped, then give it gas turning left or right (usually going up hill). Does anyone have any ideas for what this may be? Thank you in advance.
 


ericbphoto

Overlander in development
TRS Event Staff
TRS Forum Moderator
Supporting Member
U.S. Military - Veteran
TRS 20th Anniversary
VAGABOND
TRS Event Participant
GMRS Radio License
Joined
Feb 7, 2016
Messages
15,213
Reaction score
16,350
Points
113
Age
59
Location
Wellford, SC
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Type
3.0 V6
Engine Size
3.0L
Transmission
Manual
2WD / 4WD
4WD
Total Lift
6"
Tire Size
35"
My credo
In theory, theory and practice are the same. In practice, they are different.
Might want to check your differential for wear. When was it last serviced/inspected/fluid changed?
 

Randall008

Member
Joined
Jan 26, 2021
Messages
42
Reaction score
7
Points
8
Location
Maine
Vehicle Year
1988
Make / Model
Ford bronco ii
Transmission
Manual
Thanks for the feedback and advice. Sorry, I should have included this in the post. I had this inspected about 6 months ago by a specialist because I was experiencing the issue I posted about. It was fine
 

JerryC

Active Member
Joined
Apr 10, 2014
Messages
270
Reaction score
56
Points
28
Location
Tennessee
Vehicle Year
1988
Make / Model
Ford
Engine Size
2.9
Transmission
Automatic
That's tough to say without actually laying hands on, so to speak.
Here's some quick thoughts...
Engine power issue, poor engine output causing the engine to struggle and shaking the vehicle.
Bad motor mount or trans mount moving under load.
Radius arm bushings with excess play.
Bushing play in general, most likely front end.
You said the differential was checked six months ago, it might have developed a problem since then.
 
Joined
Sep 24, 2012
Messages
432
Reaction score
1
Points
16
Vehicle Year
07/86
Make / Model
ford
Engine Size
4.0
Transmission
Manual
Does it happen in all gears
 

Randall008

Member
Joined
Jan 26, 2021
Messages
42
Reaction score
7
Points
8
Location
Maine
Vehicle Year
1988
Make / Model
Ford bronco ii
Transmission
Manual
Thank you for the feedback. I had the differential checked because it was doing this, so I don't think it's the problem. It does not happen in all gears. It is more noticeable when I am turning from a stopped position. It only does it for a second when I first take off. I suppose if I were to say I was looking for a problem that I can also feel it going straight from the stopped position, but it is definitely not pronounced in this instance. I wouldn't be shocked if it was a power issue, or a bushing. The odometer says it's got 45,000 miles on it, so I am guessing it's at least 145,000. The engine runs fairly smooth, but every once in a while there is a slight hiccup, then it goes back to running smooth. There is also a little blow by. I do about half the work myself and the other half goes to the mechanic. I took it to him for this, but he said he couldn't duplicate the problem.
 
Joined
Sep 24, 2012
Messages
432
Reaction score
1
Points
16
Vehicle Year
07/86
Make / Model
ford
Engine Size
4.0
Transmission
Manual
Automatic or manual. You probably have a cv type driveline. Which you said you replaced. So we can rule that out. Rear dif has been checked. The only thing I can think of is first gear if auto is slipping and if manual the fly wheel is warped
 

Randall008

Member
Joined
Jan 26, 2021
Messages
42
Reaction score
7
Points
8
Location
Maine
Vehicle Year
1988
Make / Model
Ford bronco ii
Transmission
Manual
It might be the transmission. It’s automatic. I had this checked as well though. The transmission shop said it was fine. It’s also a brand new rebuilt trans. It was put in about 8000 miles ago, by the previous owners mechanic.
 

wildbill23c

Well-Known Member
U.S. Military - Veteran
TRS Banner 2012-2015
TRS 20th Anniversary
Ham Radio Operator
Joined
Aug 22, 2012
Messages
3,917
Reaction score
573
Points
113
Location
Southwestern Idaho
Vehicle Year
1987
Make / Model
Ford Ranger
Engine Type
2.9 V6
Transmission
Manual
2WD / 4WD
2WD
Total Lift
0
Total Drop
0
Tire Size
215/70-R14
My credo
19K, 19D, 92Y, 88M, 91F....OIF-III (2004-2005)
Possibly a shudder from the torque converter? Could be a wheel bearing issue causing a shudder too when you load that bearing up during a turn. Its a 2WD, so it wouldn't be too hard to pull the wheels off and check the bearings inner and outer for wear.

Since you had the CV joints repaired already that should rule them out, there's a U-Joint at the rear differential which can cause a terrible vibration when it starts to fail.

At a stop a vibration or shudder could be the engine not running on all 6 cylinders properly, again could be the torque converter....one thing you may try at a stop is shifting to neutral and see if the shudder/vibration goes away, that would lead to a transmission and/or torque converter problem.
 

Sponsored Ad


Sponsored Ad

Members online

Today's birthdays

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top